The attached image is the result of an image segmentation algorithm on high resolution imagery. The smaller clusters of pixels represent trees and brush and the larger cluster of pixels (marked with a red arrow) is a misclassified farm field. In ArcGIS 10.1 is there a way to select the misclassified pixels and reclassify them to 0 or NoData?

In graphics editing software like Photoshop you would use a "flood fill" tool to recolor a contiguous region of same-colored pixels. I am not sure what the equivalent is in ArcGIS.
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blah238Dec 8 '12 at 5:20